199968980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{163909}}^1$

素因数の和:163979

約数の個数: 24

約数和(自身を含む): 426821640

約数和(自身を除く): 226852660

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 163909, 327818, 655636, 819545, 1639090, 3278180, 9998449, 19996898, 39993796, 49992245, 99984490, 199968980]

約数ペア:

[(1, 199968980), (2, 99984490), (4, 49992245), (5, 39993796), (10, 19996898), (20, 9998449), (61, 3278180), (122, 1639090), (244, 819545), (305, 655636), (610, 327818), (1220, 163909)]